Finding the Fourth Proportional to 9,591.59, 13,231.71 and 8,262.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,591.59 : 13,231.71 = 8,262.99 : x
2. Step 2: Convert to fraction form
   9,591.59/13,231.71 = 8,262.99/x
3. Step 3: Cross multiply
   9,591.59x = 13,231.71 × 8,262.99
4. Step 4: Simplify right side
   9,591.59x = 109,333,487.41
5. Step 5: Solve for x
   x = 109,333,487.41/9,591.59
6. Step 6: Final answer
   x = 11,398.89